How to use this calculator
A $100 item with a 20% discount becomes $80, saving $20. If a value moves from 100 to 80, the change is -20%.
Everyday Planning
Percentage / Discount Calculator
Use this everyday calculator for discounts, price changes, simple growth, and comparison math.
Formula
Discounted price = original x (1 - discount percent). Percent change = (new - original) / original.
What the result means
This page explains the arithmetic behind the estimate so you can adjust assumptions before using the number in planning.
Read the guide
Learn how to calculate discounts, savings, and percent change for everyday planning without mixing up the math.
Percentage and Discount Calculator Guide for Everyday PlanningCommon questions
Is this a finance tool?
It is simple arithmetic for everyday planning, shopping, and comparisons.
Why include both discount and percent change?
Discount uses a chosen rate; percent change compares two values.
Does it store my input?
No. Calculations run in your browser.